/// https://doc.rust-lang.org/book/ch11-03-test-organization.html?highlight=test#integration-tests 
/// 
#[cfg(test)]
mod api {
  use http_server_lib::api;
  #[test]
  fn test_add_function() {
    assert_eq!(api::add_function(1, 2), 3);
  }
}
